Setting up a CNAME record for each of the domain names or subdomains that you've got within a hosting account allows you to redirect it to a different domain/subdomain. The forwarded domain name will lose all its records - A, MX and so on, and will take the records of the Internet domain it is being pointed to. In this light, you cannot create a CNAME record to direct your domain to a third-party company and maintain a working email service with the first provider. Also, it is important to note that a CNAME record is always a string of words and not a number because it is generally wrongly identified as the A record of the domain address being redirected. One of the primary uses of a CNAME record is to forward a domain name that you own through one provider to the servers of some other company when you have created an Internet site with the latter. In this way, the website will appear under your own domain name, not under some subdomain provided by the third-party company.
